在iOS 8中,苹果废弃了UIAlertView，UIActionSheet类,但仍然可用。你应该避免使用它,iOS的未来版本可能不支持它。
原文链接：UIAlertController Example in iOS
接下来我将交大家如何使用UIAlertController。
UIAlertController支持2中类型。使用UIAlertController你可以创建一个警告对话框(UIAlerview)或行动表(UIActionSheet).
<pre>
typedef NS_ENUM(NSInteger, UIAlertControllerStyle) {
UIAlertControllerStyleActionSheet = 0,
UIAlertControllerStyleAlert
} NS_ENUM_AVAILABLE_IOS(8_0);
</pre>
一下是在UIAlertController中非常有用的方法
<pre>
//Create UIAlertController
- (instancetype)actionWithTitle:(NSString *)title style:(UIAlertActionStyle)style
handler:(void (^)(UIAlertAction *action))handler;
//Adding an action
- (void)addAction:(UIAlertAction *)action;
//Adding text filed to UIAlertController.This method is supported only for UIAlertControllerStyleAlert
- (void)addTextFieldWithConfigurationHandler:(void (^)(UITextField *textField))configurationHandler;
</pre>
-
创建一个简单的Alert Dialog
<pre>
UIAlertController * alert= [UIAlertController
alertControllerWithTitle:@"My Title"
message:@"Enter User Credentials"
preferredStyle:UIAlertControllerStyleAlert];[self presentViewController:alert animated:YES completion:nil];
</pre> -
2创建一个alert Dialog with action
<pre>
UIAlertController * alert= [UIAlertController
alertControllerWithTitle:@"Info"
message:@"You are using UIAlertController"
preferredStyle:UIAlertControllerStyleAlert];UIAlertAction* ok = [UIAlertAction
actionWithTitle:@"OK"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
[alert dismissViewControllerAnimated:YES completion:nil];}];UIAlertAction* cancel = [UIAlertAction
actionWithTitle:@"Cancel"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
[alert dismissViewControllerAnimated:YES completion:nil];}];[alert addAction:ok];
[alert addAction:cancel];[self presentViewController:alert animated:YES completion:nil];
</pre> -
3 创建一个actionSheet with action
<pre>
UIAlertController * view= [UIAlertController
alertControllerWithTitle:@"My Title"
message:@"Select you Choice"
preferredStyle:UIAlertControllerStyleActionSheet];UIAlertAction* ok = [UIAlertAction
actionWithTitle:@"OK"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
//Do some thing here
[view dismissViewControllerAnimated:YES completion:nil];}];UIAlertAction* cancel = [UIAlertAction
actionWithTitle:@"Cancel"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action)
{
[view dismissViewControllerAnimated:YES completion:nil];
}];
[view addAction:ok];
[view addAction:cancel];
[self presentViewController:view animated:YES completion:nil];
</pre> -
-
Create an Alert dialog with username and password fields.
<pre>
UIAlertController * alert= [UIAlertController
alertControllerWithTitle:@"My Title"
message:@"Enter User Credentials"
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {
//Do Some action here}];UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {
[alert dismissViewControllerAnimated:YES completion:nil];
}];[alert addAction:ok];
[alert addAction:cancel];[alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = @"Username";
}];
[alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = @"Password";
textField.secureTextEntry = YES;
}];[self presentViewController:alert animated:YES completion:nil];
</pre> -
